Computer Information System Construction Based on Information System Security Level and Structure Model

Objective: with the development of information technology, computer information system has become the lifeblood of the national institutions and the pillar of the social activities, so the information security is particularly important. Methods: in this paper, according to the level and structure of information security model, it is proposed based on the host, network, facilities, and methods such as the security policy of security events. Process: design a system of information system security model and empirically validate the practicability of this model. Analysis: use the method of risk analysis technology forms and advantages of system security threat. Conclusion: building a set of perfect security system for information system from the system angle. To detect the story boundary (SB) of Xinwenlianbo precisely, this paper proposes a method of three-level criterion story segmentation (SS) based on content analysis. For the story with anchorperson, this paper uses penny distance to judge whether the anchorperson gotten by video feature is true or not to look for SB; for the story without anchorperson, this paper looks for the SB by judging the shot change point occurs in the silence region.